Bismuth Trichloride is toxic. Avoid exposure.
Conc. HCl is corrosive and toxic. Use care.
Chemicals and Solutions:
Large hydrometer with black tape
250 mL graduated cylinder
25 mL graduated cylinger
Add 25 mL BiCl3into hydrometer.
Add 150 mL of water (white ppt forms)
Add 15 mL conc. HCl (dissolves ppt).
BiCl3 (aq) + H2O ↔ BiOCl(s) + HCl
(This demo shows effectively the same principle as the cobalt equilibrium demo. The cobalt equilibrium demo shows principle with color rather than precipitate.)